Metal-working apparatus



l. A. DOANE. METAL WORKING APPARATUS.

APPLICATION FILED MAY 10. I917.

Patented Mar. 2, 1920.

4 SHEETSSHEETI -INVENTOR. jknzqpamze.

BY f

A TTORNE YS.

WITNESSES J. A. DOANE. METAL w'omuue APPARATUS.

APPLICATION FILEDMAY I0. 19!].

1,332,248. Patented Mar. 2, 1920.

4 SHEETSSHEET 2.

\ INVENTOR.

ATTORNEYS.

WITNESSES J. A. DOANE.

METAL WORKING APPARATUS.

APPLICATION FILED MAY 10. um.

Patented Mar. 2; 1920.

4 SHEETS-SHEET 3 INVENTOR. JZbzA. Domw.

WYM

WITNESSES w. 12. Em

ATTORNEYS.

J. A. DOANE.

METAL WORKING APPARATUS. APPLICATION FILED MAY$0.19I7.

4 SHEETSSHEET 4.

@j 3 (0] W "U Q o D Q N & J WITNESSES- B t INVENTOR. I $722214 B00216 fly: BY 7, 2/

A TTORNE Y5.

UNITED STATES PATENT OFFICE.

JOHN A. DOANE, OF SPRINGFIELD, MASSACHUSETTS, ASSIGNOR T0 DOANE AUTOMATIC MACHINE COMPANY, OF SPRINGFIELD, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

Specification of Letters Patent.

Patented Mar. 2, 1920.

Application filed May 10, 1917. Serial No. 167,654.

To all whom it may concern:

Be it known that I, JOHN A. DOANE, a citizen of the United States of America, residing at Springfield, in the county of Hampden and State of Massachusetts, have invented certain new and useful Improvements in Metal-VVorking Apparatus, of which the followin is a specification.

This invention re ates to machines for automatically finishing articles, as by grinding or analogous operations. The invention, while capable of general application, finds one advantageous use "in grinding machines for finishing the faces of cylindrical articles or rings, such as piston rings, ball races, and the like. for example.

An object of the invention is to provide a machine for automatically finishing articles, wherein the articles may be successively and automatically positioned on a suitable work holding means in proper position for engagement by a finishing tool.

Another object of the invention is to provide an automatic finishing machine comprising a finishing tool, a work holding means, and automatic mechanism to deliver the articles to be finished successively to said means, mechanism to move the tool and means the one relatively to the other and means to automatically move the finished articles from the work holding means.

Another object of the invention is to provide in a machine for automatically finishing articles, an electromagnetic chuck, mechanism automatically operable to successively position articles one by one on said chuck, a tool movable relatively to the chuck to finish the articles, and a controlling device for the chuck operable by the relative movement of the latter and the tool, whereby the articles may be automatically gripped by the chuck during the operation of the tool.

Other objects and advantages will appear in the following description and will be particularly pointed out in the appended cl aims.

The invention, in an embodiment at present preferred, is shown for illustrative purposes in the accompanying drawings, in which- Figure 1 is a front elevational view of the machine;

Fig. 2 is a side elevational view thereof;

Fig. 3 is a cross sectional view taken on the line 3-3 of Fig. 2; and

Fig. l is a plan view of the machine.

Referring to these drawings in detail, the machine in general comprises a reciprocable tool carrying slide, a rotatable work supporting magnetic chuck, a feeding device to automatically deliver work to be finished to the chuck, and to automatically remove finished work therefrom, and automatic con trolling means for the chuck to energize and denergize the latter at proper intervals.

The tool carrying slide will first be described with reference to Figs. 2, 3, and 4t. Secured to a bed plate A is a hollow upright frame B, the horizontal upper surface of which is formed with a dovetailed slideway 7 (Fig. Slidably mounted on the. latter is a carriage 8 and journaled therein is a shaft 9 which extends beyond one end of the carriage and bears a suitable tool 10, such as a grinding wheel for example. Shaft 9 may be driven from a suitable source of power by a pulley 11 and suitable connections therewith.

Mounted in suitable bearings on bed A and arranged near the rear of the latter and at right angles to the travel of carriage 8 is a shaft 12 which may be driven from a suitable source of power by belt connections to a pulley 13. Fixed on shaft 12 is a worm 14. which meshes with a worm wheel 15 fixed on the rear end of a horizontal shaft 16. The latter is mounted in pedestal B near the base thereof and in parallel relation with the carriage 8. Fixed on shaft 16 is, a cylinder cam 17 (Figs. 1 and 3) which has a suitable cam groove, as shown, to receive a roll 18. The latter is pivotally mounted on the lower end of a lever 19 (Figs. 1 and 3) which is disposed within the hollow pedestal B and is pivoted intermediate its ends to the latter on a pin 20. The upper end of lever 19 is rounded as shown in Fig. 2 and rests in a suitable recess in a block 20. The latter, as clearly shown in Fig. 3, is dovetailed into the carriage 8, and the latter is capable of a limited range of movement relatively to block 20 to vary the position of tool 10 with relation to the work to be finished. Rotatably mounted in carriage 8 is a rod 21 which is held from axial movement on the carriage by collars 22. On one end of rod 21 is a hand wheel 23, whereby the rod may be turned, and the other end of rod 21 is threaded into block 20 as indicated in Fig. 2. It will thus be seen that,

by turning wheel 23, carriage 8 may be moved relatively to block 20 not to vary the stroke of the tool but to vary the location of the stroke relatively to the work to be finished.

The work to be finished by tool 10 is adapted to be carried by an electro-magnetic chuck 25 (Figs. 1, 2, and 4). The latter has been indicated in the drawings in conventional form only, and further illustration is unnecessary to an understanding of the invention since magnetic chucks are now well known. Any suitable type of electro-magnetic chuck may be used as desired. The chuck 25 is fixed on the upper end of a vertical shaft 26 which is mounted in a slide 27 and may be driven by the pulley 28 from a suitable source of power. Carriage 27 is slidably mounted on dovetailed ways 29' formed on the forward vertical face of ped estal B, and the carriage may be held to the ways in various positions of vertical adjustment by any suitable means, such as the screws 30, for example. (See Figs. 2 and 4). The axes of shafts 9 and 26 are arranged at right angles to one another and both lie in a common vertical plane.

The means for automatically feeding work to the described chuck 25 are best shown in Figs. 1 and 4. Referring to these figures, a vertically upstanding pedestal C is secured to bed A to the right of pedestal B and on the forward vertical face of pedestal C dovetailed ways 31 are formed. A bracket 32 is slidable on ways 31 and may be clamped thereto in various positions of vertical adjustment by any suitable means, such as the screws 33, for example (Fig. 4). The upper part 32 of bracket 32 extends forwardly from and at right angles to the bracket and is extended on each side thereof, as shown in Figs. 1 and 4. The lower horizontal face of the part 32' is formed with a dovetailed recess 33 (Fig. 2) in which a slide 34 is mounted. To the lower face of slide 34 is secured a plate 35, and the latter is slidably supported upon a table 32 which is an integral part of bracket 32 and is arranged in spaced parallel relation below the part 32'.

Fixed near the forward end on the described shaft 16 is a cam37 which is formed with cam surfaces 38 and 39, a dwell surface 40 intermediate the latter and a let off surface 41 connecting the surface 39 to surface 38, all as clearly shown in Fig. 1. A lever 42 pivoted intermediate its ends at 43 to a bracket secured to bed A has a suitable roll to engage the periphery of cam 37. The upper end of lever 42 is connected by a link 44 to a lug 45 which is secured to the forward face of the slidable block 34. The

roll on lever 42 is held in engagement with tal C and is connected b a flexible cable 47 to a suitable In 48 (Fig. 1) on the base of plate 35, the ca ble 47 passing over suitable pulleys 49, as clearly indicated in Fig. 1. A suitable slot 50 is formed in the member 332 as shown in Fig. 1, to receive lug 48 and permit free sliding movement of plate 35.

The work to be finished, in this instance piston rings 7", is contained in a magazine 51 which is secured, as clearly shown in Fig. 1 to the described member 32'. The magazine 51 of hollow c lindrical form is disposed between the w eel 10 and member 32 with its axis slightly inclined from the vertical. The rings 1', stacked face to face within magazine 51, are sup orted by the lowermost ring 1- of the pi e, which ring rests upon the upper face of member 32 and is disposed in a circular hole 52 in plate 35 (F1 s. 1 and 4).

T e controlling means for the electromagnetic chuck 25 comprises two fingers 53 and 54 which are adjustabl mounted in suitable brackets, as clearly s own in Figs. 2 and 4, secured to and insulated from the carriage 8 and pedestal B, respectively. As the carriage B moves forwardly (see Fig. 4), the finger 53 engages finger 54 and closes a suitable electrical circuit (not shown) to the chuck 25. Fingers 53 and 54 are arranged to remain in contact during the relatively short travel of tool 10 across the work, which, in this instance, consists of iston rings 7.

he operation of the machine will next be described. Assuming the parts to be in the relative positions shown in the drawings and that power is applied to the pulleys 11, 13, and 28, the cam 37, as it rotates in the direction of the arrow shown in Fig. 1, moves lever 42 by the cam surface 38, and carries plate 35 to the left, as viewed in Fig. 1. The lowermost ring 1- is removed. from the stack of rings in magazine 51 by plate 35, and the stack is sup orted during the travel of plate 35 upon t e upper surface of the latter. A ring 1' is thus carried to the left and is supported during its travel on member 32 until it reaches the chunk 115 25, the member 32 having a curved end to partially encom lla and lie closely adjacent the chuc The cam surface 38 causes the lever 42 to move sufficiently to carry ring 1- into central relation with chuck 120 25. The rings are thus centered upon chuck 25 and held in properly centered relation by the plate 35 which remains stationarv due to the fact that the roll of lever 42 rides upon the concentric dwell surface 40. 125 The carriage 8 then begins to move forwardly by cam 17 and, as the carriage is thus moved, fingers 53 and 54 enga each other and effect an energization o chuck 25 by suitable electrical connections. The 130 ring is thus held to the rotating chuck, and, as it revolves, the upper face of the ring is finished by the rotating wheel 10 which is moved thereacross by continued move ment of cam 17. Still further movement of the latter will retract carriage 8 and will separate fingers 53 and 54 to deenergize chuck The roll on lever 42 then rides off the dwell surface 40 onto the cam surface 39 which causes the plate 35 to move still farther to the left carrying the finished ring 0" into the left hand dotted line position shown in Fig. 1. The finished ring 1 then drops through hole 52 in plate 35 and may fall into any suitable container not shown. After plate 35 has moved to its extreme left hand position, the roll on lever a2 rides off surface 39 onto the left-off surface il, whereby the plate 35 is carried rapidly back to the position illustrated in Fig. 1. When plate 35 is thus positioned, the lowermost ring 0" in magazine 51 drops into hole 52 and the described operations are then repeated. The other faces of rings 0 may be finished by stacking the rings in the magazine with the finished faces down and the carriage 27 may be raised the necessary amount by the vertical adjustment described.

Thus, an improved machine has been provided, wherein articles may be finished in a rapid, eflicient, and automatic manner. Although the invention has been described in a preferred form for illustrative purposes, the scope of the invention is defined by the appended claims rather than by the foregoing description.

lVhat I claim is 1. A machine for automatically finishing articles, comprising in combination, a holding and supporting means for articles to be finished. a tool for finishing the articles, said tool and means being relatively rotatable, and automatic mechanism for the combined delivery of the articles to and the removal of articles from said means.

i A machine for automatically finishing il-ltlClQf-l, comprising in combination, a rotatable holding and supporting means for articles to be finished, a tool for finishing articles. feeding means to move the tool across the articles, and automatic mechanism for the combined delivery of the articles to and the removal of the articles from the first named means.

3. A machine for automatically finishing articles. comprising in combination, a holding and supporting means for the articles to be finished, a tool for finishing the articles while held by said means, said tool and means being relatively rotatable, a magazine for articles to be finished and arranged out of the path of said tool and means, and automatic mechanism to carry an article from said magazine to said means for the finishing operation, and to later remove the article from the latter after the finishing operation.

4. A machine for automatically finishing articles, comprising in combination, a magnetic chuck, automatic mechanism to deliver articles to be finished to the chuck, and a tool for finishing the articles, said tool and chuck being relatively rotatable one to the other, said mechanism including means to remove the finished articles from the chuck.

5. A machine for automatically finishing articles, comprising, a rotatable holding and supporting means for articles to be finished, a rotatable tool for finishing the articles While held by said means, mechanism to move the tool across said means, and automatic means movable between the first named means and the path of said tool to deliver articles to be finished to the firstnamed means and to later remove the finished articles therefrom.

6. A machine for automatically finishing articles, comprising, a chuck to hold and rotate articles to be finished, a rotatable grinding Wheel to finish the articles while held by said chuck, and a feeding device movable across the face of said chuck to deliver the articles thereto in position for grinding and later movable to remove the articles from the chuck after the grinding operation.

7. A machine for automatically finishing articles, comprising, a chuck to hold and rotate articles to be finished, a rotatable grinding wheel to finish the articles While held by said chuck, a magazine for the articles to be finished, a reciprocable feeding device to receive articles one by one from said magazine and carry them to, across and beyond the face of said chuck, and means to actuate said device including means to interrupt the travel thereof during the grinding operation.

8. A machine for automatically finishing articles, comprising in combination, an electro-magnetic chuck, automatic mechanism to deliver and position articles thereupon, a tool for finishing the articles, means to move the tool and chuck relatively to one another, a controlling switch for the chuck and automatic means to operate the switch whereby the latter is closed as the articles are positioned upon the chuck, said mechanism including means to remove finished articles from the chuck, said automatic means being arranged to open the switch prior to the operation of said last-named means.

9. A machine for automatically finishing articles, comprising in combination, a magnetic chuck, automatic mechanism movable at right angles to the axis of the chuck and arranged to deliver articles to be finished to the chuck, a tool for finishing the articles,

lli

said chuck being movable toward and away from said tool, means to rotate the chuck and tool, and feeding means to move the tool across the articles, in a direction at right angles to the axis of the chuck and to the line of travel of said mechanism.

10. A machine for automatically finishing articles, comprising in combination, an electro-magnetic chuck, a tool rotatable relatively thereto, a magazine to receive the articles to be finished, a reciprocable slide, arranged to remove the articles one by one from the magazine, means to reci rocate the slide from the magazine to and eyond the chuck, said last-named means including means to interrupt the feeding stroke of the slide during the operation of the tool, whereby the slide delivers and positions an article upon said chuck, remains stationary during the operation of said tool, moves a far ther distance to discharge the finished article and subsequently returns to receive another article from said magazine.

11. A machine for automatically finishing articles, comprising in combination, a rotatable grinding wheel, a rotatable magnetic chuck movable to and from the wheel, a magazine to receive the articles to be finished, automatic mechanism to remove the articles one by one from the magazine and position them on the chuck, reciprocable means operable as an article is positioned on the chuck to feed the wheel thereacross, and adjustable means to permit movement of the wheel relatively to said reciprocable means.

12. A machine for automatically finishing articles, comprising in combination, a rotatable grinding tool, a rotatable electro-magnetic chuck arranged with its axis at right angles to that of tlie tool, a magazine for articles to be finished, a reciprocable slide movable in a direction at right angles to the axes of the tool and chuck, means to move said slide to position an article on said chuck, feeding means to reciprocate the tool across the article operable when the latter is positioned on the chuck, means to move the slide after the operation of said tool to a position to discharge the article, and means to return the slide to receiving position with relation to the magazine.

13. A machine for automatically finishing articles, comprising in combination, a rotatable grinding tool, a rotatable electro-magnetic chuck arranged with its axis at right angles to that of the tool, a magazine for articles to be finished, a reclprocable slide movable in a direction at right angles to the axes of the tool and chuck, means to move said slide to position an article on said chuck, feeding means to reci rocate the tool across the article operable w en the latter is positioned on the chuck, a switch operable by movement of the feeding means to control the chuck, means to move the slide after the operation of said tool to a position to discharge the article, and means to return the slide to receiving position with relation to the magazine.

14. A machine for automatically grinding or machining articles, comprising in combination, a rotatable tool, a rotatable magnetic chuck, means to move one relatively to the other, a magazine for articles, a feeding mechanism to deliver articles to the chuck and remove them therefrom, and automatic means to coordinate the operation of the chuck and tool with the feeding mechanism.

15. A machine for automatically grinding or machining articles, comprising in combination, a rotatable tool, a rotatable magnetic chuck, means to move the tool relative to the chuck, a magazine for articles, a feeding mechanism to deliver articles to the chuck and remove them therefrom, and automatic means to coordinate the o eration of the chuck and the tool with t e feeding mechanism.

16. A machine for grinding or machining articles, comprising in combination, a rotatable magnetic chuck having a vertical axis, a rotatable tool whose axis is arranged at an angle to the axis of the chuck, means to permit adjustment of the position of the chuck relative to the tool, automatic means to move the tool relative to the chuck, a magazine for articles, a feeding mechanism operating in a plane at an angle to the axis of the chuck to deliver articles to the chuck, an actuating mechanism operable to automatically coordinate the operation of the elements described.

17. A machine for grinding or machining articles, comprising in combination, a rotatable tool, a magnetic chuckto support the articles to be finished, means to move the tool relative to the chuck, means to permit adjustment of the chuck relative to the tool, a magazine for articles to be finished, a feeding mechanism to deliver the articles to the chuck, means to permit adjustment of the operative plane of the feeding mechanism.

JOHN A. DOANE. 

